https://www.issuelab.org/resources/46102/46102.pdf
https://www.issuelab.org/resources/46146/46146.pdf
https://www.issuelab.org/resources/46182/46182.pdf
https://www.issuelab.org/resources/45721/45721.pdf
https://www.issuelab.org/resources/45737/45737.pdf
https://www.issuelab.org/resources/45915/45915.pdf
https://www.issuelab.org/resources/45929/45929.pdf
https://www.issuelab.org/resources/45938/45938.pdf
https://www.buzzfeed.com/deltaairlines_customersupport
https://www.buzzfeed.com/delta_customerservicenumber
https://www.buzzfeed.com/deltaairlinescustomer_care
https://www.buzzfeed.com/deltaairlinestollfree_number
https://www.buzzfeed.com/american_airlinescustomer_care
https://www.buzzfeed.com/americanairlinetollfreenumbers
https://www.issuelab.org/resources/46178/46178.pdf